/Engine/Plugins/Animation/ControlRig/Source/ControlRig/Public/Rigs/RigHierarchyController.h
Removes an existing parent from an element in the hierarchy. For elements that allow only one parent the element will be unparented (same as ::RemoveAllParents)
Returns true if successful.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category=URigHierarchyController) bool RemoveParent ( [FRigElementKey](API\Plugins\ControlRig\Rigs\FRigElementKey) InChild, [FRigElementKey](API\Plugins\ControlRig\Rigs\FRigElementKey) InParent, bool bMaintainGlobalTransform, bool bSetupUndo, bool bPrintPythonCommand )